That's only because physicalness has implied scarcity. If tomorrow FTL space travel were invented and super cheap and we discovered a million earths rich in resources and suddenly physicality was as cheap and plentiful as digital things, then the "real value" of being physical would diminish almost completely.
You taking odds on that happening? ;-) Hell, America has to hitchhike in Russia just to get a lift into orbit right now. I'll wager that that scarcity won't be reduced in the next couple of decades.